Process of electrically extracting essential oil.



PATENIBD .TUNE 21, 1904.

APPLICATION FILED JUNE 27. 1898.

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No. 763,151. PATENTED JUNE 21, 1904. I G. D. B.UB.TON. I PROCESS OFELEOTRIOALLY EXTRAGTING ESSENTIAL OILS.

PPLIOATION FILED JUNE 27, 1898. N0 MODEL.

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No. 763,151. v PATENTED JUN'E121, 1904; G. D. BURTON. PROCESS 0FELEGTRIGALLY .BXTRACTING ESSENTIAL OILS.

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INVENTQR PATENTED JUNE 21, 1904.

G.D.BUR T0N. PROCESS oF ELEGTRIGALLY BXTRAoTING-BssB-NTIAL OILS.

APPLICATION FILED JU 27. 1898.

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R u l N E4 V Wr N0.-7 63,151. f PATENTED JUNE 21, 1904.

G. D. BURTON. i 'PROCESS 0E' ELEGTEISALLY EXTRAGTING ESSENTIAL OILS.

l APPLICATION FILED JUN 27. 1898. l N0 i(xIOIJEL.A 5 SHEETS-SHEET 5.

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INVENTDR ISM GEORGE D. BUR"ON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TOBOSTON Patented June 21, 1904.

PATENT OEEICE.

LEATHER PROCESS COMPANY, OF PORTLAND, MAINE.

PROCESS OF ELECTRICALLY EXTRACTING ESSENTIAL OIL.

SPECIFICATION forming part of Letters Patent No. 763,151, dated. June21, 1904.

Application filed June 27, 1898. Serial No. 684,595. (No specimens.)

To all whom, it may concern:

Be it known that I, GEORGE D. BURTON, a citizen of the United States ofAmerica, residing in Boston, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful Improvements inProcesses of Electrically Extracting Essential Oils, of which thefollowing is a specification.

This invention relates to the art of obtain- IO ing csscntialoilsmfrombark or other vegetable matter i 'i "5"' The object of the invention isto facilitate and hasten thc operation.

The invention consists principally in immersing the vegetable mattercontaining the essential oils to be extracted in a suitable menstruumand passing through said menstruum an electric current which heatstheliquid and causes a rapid extraction of such oils. The material ispreferably placed in porous bags bcforc immersion in the menstruum, andthe vapors arising during 'the operation are preferably condensed.

The accompanying drawings represent a convenient apparatus for carryingout this process.

Figure 1 thereof represents a longitudinal vertical section of suchapparatus, in Which the material to be treated is placed in porous bags.Fig. 2 represents a -top plan view thereof omitting the cover of themain tank. Fig. 3 represents an end elevation of the apparatus with aportion of the cover broken out. Fig. 4 represents a vertical section ofa tubular universal joint in the pipe connecting the extracting-tankwith the condenser. Fig. 5 represents a longitudinal section of theextracting-tank provided with a perforated pipe through which air orsteam may be supplied to the tank and in which the material is disposedloosely in the tank instead of being incloscd in bags. Fig. 6represents-a plan view of the tank shown in Fig. 5.

The same reference characters indicate corresponding parts in thedifferent figures.

The process may be carried out by any suitable apparatus. The apparatusherein shown comprises an extracting-tank A,- provided ivith suitablesupporters A, and With a cover vmeans of said projections near one endof the tank inthe notched supporting-bars H3, the notches rendering theelectrode ad justable at a greater or less distance from the end of theVtank. A perforated guard-plate H is supported by means of insulatingconnections H4 on the inner side of the electrode H and serves toprevent the material in the tank from coming into contact with saidelectrode.` A conductor H2 is connected with said electrode H and passesout through the end Wall of the tank and is connected to one pole of asuitable elec-I tric source. A similar electrodewK, also preferably inthe form of a transverse plate provided with projections f; (see Figs. 2and 6) at its top, is suspended by means of said projections from thesupporting-bars K3 and is adjustable toward andV from the opposite endof the tank. A guard-plate K', preferably perforated, is attached byinsulating connections K'i to the electrode K on the inner side thereof.A conductor K2 is connected with electrode K, passing out through theopposite end of the tank, and is connected to the opposite pole oftheelectric source.

The cover B is preferably provided on its interior with supension-hooksB and on its exterior with handles B2. It is also provided With anopening having a door l), hinged at P. This door is balanced by WeightR3, connected thereto by a cord R, which passes over pulleys R and R2,as shown in Fig. 3. The condenser comprises a small tank D forcontaining a cooling liquid and a Worm D2, coiled in said tank. Theconnecting-pipe C is provided in its upright portion leading out fromthe tank with an adjustable lioint C and in its downward portion leadingto the condenser with a hollow universal joint C, which admits of freeadjustment of the parts.

In carrying out the process by means of this apparatus the material fromwhich the essential oil is to be extracted-fsuch, for nstance, astanbark-is placed in porous bags T and disposed in the tank in asuitable menstruum therein. This menstruum may consist o1 water or anysuitable aqueous solution which permits the passage of the electriccurrent. Then a current of electricity of a required power for heatingthe liquid and extracting the matter contained in the substance undertreatment is turned on. The current varies according to the size of thetank used, ranging from four to tive hundred volts and from one to onehundred and lifty amperes. As the liquid and its contents become heatedthe current increases unless cut ott by interposed resistance and theprocess of maceration and digestion progresses and the menstruum becomesmore rich in extractive matter until the substance under treatmentbecomes exhausted, or substantially so. The heated menstruum gives ofi'vapors consisting mainly ofthe volatile portion ofthe essential oilmixed with aqueous vapor which pass over through the pipe C when inexcess into the condenser D, where they are condensed, and thence passto the receptacle E. For convenience in draining the material containedin the bags after the extracting operation the bags may be suspendedupon hooks B in the cover or dome B, as indicated by dotted lines inFig. l.

In 5 and 6 the extracting-tank is provided at its bottom with a coil ofperforated pipes S, the perforations being shown as on the under side ofthe coil of pipes. These perfor-ations may supply air or steam underpressure and constitute an agitator for the loose material within thetank. 1n carrying out the process by means of this form oi apparatus theelectric current is passed through the menstruum in a mannerhereinbet'ore described and operates to heat it and the vegetable matterimmersed therein until the essential oil is steeped out or extractedtherefrom. The air or steam supplied through the perforated pipeprevents any permanent lodgment of the bark or other material on thebottom of the tank and keeps the material in a continued state ofagitation, thereby exposing it more effectually to the steepingoperation.

I claim as my inventionm 1. The process of obtaining essential oil frombark or other vegetable matter, which consists in immersing thevegetable matter containing the oil to be extracted in a suitablemenstruum, and passing through said menstruum an electricheating-current of such a voltage and amperage as will raise themenstruum to a temperature suflicient to extract the essential oil.

2. The process of obtaining essential oil Jfrom bark or other vegetablematter, which consists in immersing the vegetable matter containing theoil to be extracted in a suitable menstruum, passing through saidmenstruum an electric heating-current of such a voltage and amperage aswill raise said menstruum to a temperature sufficient to extract theessential oil, and condensing the vapors arising from the operation.

In testimony whereof l have signed my name to this specilication, in thepresence of two su bscribing witnesses, on this 24th day of June,

A. D. 1898. p

GEO. D. BURTON.

Vi tn esses:

ALBERT M MANN, FRANK Gr. PARKER.

